So her nephew Rios understood when his aunt "planned for weeks" in order to leave Pepper with him at his mother's home in Fresno, California, when the rest of his family trekked to Disneyland in Anaheim.

"I was stuck watching everything," Rios recalled to ABC News. "And she goes, 'OK. I need you to come by the day before and I'm going to show you the list.' And I'm like, 'Wait. What?'"

Tommy Rios

Tommy Rios' aunt Elaine wrote him a now viral list of rules when he watched her dog Pepper for the first time July 10, 2017.

Elaine had created a two-page list titled, "Pepper the most beautiful girl in the world," that included details on when to feed Pepper, what snacks she's allowed to have and issued reminders on how to show affection such as "big hugs little kiss, sniffs, belly rubs."

The list ended with "and most important ... don't you hate her cause you ain't her!"

Rios said all he could do was laugh. He later decided to post the list, with an adorable photo of Pepper, to Twitter that said, "just to show everyone how my aunt is."

When Elaine, who left on family vacation Monday, found out her list went viral, she took it in stride.

"It’s a little overwhelming, especially because I’m completely social media illiterate," Elaine said, adding that many dog owners understand her list. "Some of them are even asking to open an account for Pepper."